Device for automatically disconnecting power-driven pumps.



PATENTED JULY 30, 1907.

A. L. OLSON.

DEVICE FOR AUTOMATICALLY DISOONNEOTING POWER DRIVEN PUMPS.

APPLICATION FILED MAY 29, 1906.

WITNESSES v ATTORNEY .AXEL L. OLSONQOF E sSEX QoNNECTlCUTf DEVICE FORAUTOMATICALLY DISCONNECTING POWER-DRIVEN PUMPS.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed May 29, 1906. fierial No. 319.307.

7 To all whom it may concern Be it known that 1, Axial. L. OLSON, acitizen of the i United States, residing at Essex, county of Middlesex,

State of Connecticut, have invented a new and useful Device forAutomatically Disconnecting Power- Driven Pumps, of which the followingis a specification.

This invention is applicable to power-driven air pumps generally and isespecially adapted for use upon automobiles provided with ,power pumpsfor inflating the tires, and the invention has for its object to providea device that will automatically disconnect the pump from the power whenthe pressure in a tire shall have reached a predetermined height, asindicated by v a pressure gage. 7

With this and other objects in view I have devised the noveldisconnecting device of which the following description in connectionwith the accompanyingdrawing is a specification, reference charactersbeing used to'indicate the several parts: i v

Figur'el is an elevation of so much of an automobile as is necessary toillustrate the application thereto of a power driven air pump and mynovel disconnecting device; Fig. 2 a detail view on an enlarged scale,partly in elevation and partly in section, illustrating my noveldisconnecting device detached; and Fig. 3 is a" detail view illustratingthe connection of the shipper rod to the operating lever. v

'10 denotes the frame of an automobile, 11 the dashboard, 12 a wheel and13 a powei-driven air pump-rigidly secured to the frame. The pump may beoperated in any suitable manner as by means of a sprocket chain 14extending from a driving sprocket, not shown,

which runs with the car standing or in motion, and passing over asprocket wheel 15 on the shaft of the pump. Wheel 15 normally runs looseon the pump shaft, not shown, and is connected thereto by means of asuitable clutch 16, one member of which is shown in the present instanceas carried by an operating lever 17 k pivoted on a bracket 18 extendingfrom the pump. The clutch is not illustrated in detail for the reasonthat specifically it forms no portion of my present invention and anyordinary or preferred form ofclutch may be used. I

19 denotes the-shipper rod which is connected to the operating lever,preferably by means of a spring connection 20, as indicated in Fig. 3.Thisshipper rod extends rearwardly and passes through the dashboard,

to the dashboard, the action of which is to draw the shipper rodbackward when the shoulder is disengaged I fromthe projection,disconnect the clutch members and stop the operation of the pump, asindicated in Fig. 1. 1 I I 27 denotes anair pipe leading from the pump,28 a pipe leading from pipe'27 to the hub of the wheel, 29 a pipeleading from the hub to the tire; 30 a pipe leading from pipe 27 to apressure gage 31 on the dashboard, and

32 an air inlet pipe leadingfrorn pipe 30 to my novel disconnectingdevice, which as a whole have indicated by 33. It should be understoodthat these pipes are merely enumerated specifically in order toillustrate the operationof my novel disconnecting device,

which air is conveyed to the tire being wholly unimportant so far as thepresent invention is concerned.

My novel connecting devicecomprises a cylindrical air receiver 34 closedat the top by means of an adjustthe special arrangement of the pipes andthe manner in able screw plug 35. Within the receiver is a piston 36whose rod 37 extends through the serew cap. A spring 38-bearing againstthe piston and the inner end of the screw plug normally acts to retainthe piston at its forward or inoperative position. The lower end of thepiston rod is extendedbeyond the piston and is. adapted to engage theinner end of the body and prej vent the movement of the piston past theair inlet pipe. The upper end of the piston rod lies below the shipperrod and in alinement therewith. Air inlet. pipe 32 leads into the lowerend ofthe receiver below the piston and. is preferably provided with,atrap 40 to 3 prevent the possibility of oil passing from the receiver tothe main air pipe 27 r To set the disconnecting device,the pump isstarted and the pressure in the tire raised to the desired height, asindicated by the gage. The operator then turnsthe screw plug up or down,as may be required, until the piston rod is at just the required heightto disengage the shipper rod from plate 26 at the pressure indicated bythe gage. Having set the disconnecting device to disengage the shipperrod at any desired tire pressure,

by the gage, the operation of the disconnecting device will in future beentirely automatic. As soon as pump pressure is applied in inflating atire, it is obvious that the pressure at the'gage, in the tire and inthe receiver of the disconnecting device will be the same. The

operation of the pump. ,To start the pump at any .for example fromeighty to ninety pounds as indicated time, the operator places his footagainst the knob, presses the shipper rod forward and connects theshoulder with the projection on plate 26. This throws the clutch membersinto engagement and starts the pump to operating again. To set thedisconnecting device to operate at a higher pressure, the screw plug isturn ed innected by'simply lifting the shipper rod by the foot or handand allowing spring 25 to draw it backward as soon as the shoulder isdisengaged from the projection.

Having'thus describedmy invention I claim: -1. The combination with avehicle having a tire to be lnfiated of a pump supported by the frame ofthe vehicle,

said pump being independent of the wheels of the vehicle, an air conduitfor supplyingthe tire with air from said pump, means including a rod forcontrplling the power operation of the pump, an, air receiverconnected'withihe air conduit, 2. piston in'said receiver, and meanswhereby variations inthe position of the piston due to the air "pressurewill shift the position of said rod.

2. The combination with a vehicle having a tire to be inflated, of apump supported by the frame of thevehicle, said'pump being independentof the wheels of the vehicle, an air conduit for supplying the' tirewith air from said pump, means including a rod for controlling the poweroperation of the pump, an air receiver-connected with the airconduit, aspring-controlled piston ,in said receiver,

and a rod extending from said piston and adapted to engage'the pumpcontrolling rod.

3. The combination with a vehicle having a tire to be inflated, of apump supported by the frame of the vehicle,

said pump being independent of the wheels of the vehicle, an air conduitfor supplying the tire with air from said pump, means including'a rodforcontrolling the power operation ofthejpurhp, an air recelver con nectedwith the air con'd'uit, an-a'djustable screw plug closing one endof thereceiver, a'piston in said receiver, a spring acting against thepistonto' force it in one direction, anda' rod extending from saidpiston and passing through the screw plug and adapted to engage the pumpcontrolling rod to shift it laterally .out of engagement with'its,catch.

4. Thecombination with a vehicle having a tire to be inflated, of a pumpsupported by the frame of the vehicle, said pu'nip beingindependentofthe wheels of the vehicle,

-an air conduit/for supplying the tire with ainfrom said pump, meansincluding a rod'for controlling the power operationof the pump a springconnected with said rod to move it in one direction, a catch forrestricting themovement of said rod. under the influence of its spring,an air receiver connected with the air conduit, an adjustable screw-plugclosing one end of the receiver, a piston in said receiver, a springacting against the piston to force .it in one direction, and a rodextending from said piston and passing through the screw plug andadapted to engage the pump controlling rod to shift it laterally out ofengagement withits catch.

5 The combination with a vehicle having a tire to be, inflated, of apump supported by the frame of the vehicle,

said pump being independent of the Wheels of the vehicle, an air conduitfor supplying the tire with air from said pump, a clutch for connectingand disconnecting power ope rated mechanism from the pump, alongitudinally-movable and laterally-shiftable shipper rod by which theclutch is operated and which is provided with a notch, a plate' throughwhich the shippergrod passes and which is provided, with a detent toengage the notch and aspring for drawing the shipper rod backward anddisconnecting the clutch when the notch is disengaged, of a disconnecting device comprising an air receiver. a piston in said inflated, of apump supported by the frame of the vehicle,

said pump being independent of the wheels of the vehicle, an air conduitfor supplying the tire with air from said pump, a clutch for connectingand disconnecting power operated mechanism from the pump, alongitudinallymovable and laterally-shiftable shipper rod by which theclutch is operated, a detent' for retaining the shipper rod in positionto retain the clutch members in engagement, and a spring for drawing theshipper rod backward and disengaging the clutch members,'of adisconnecting device comprising an air receiver, a piston in saidreceiver a' rod extending therefrom and adapted to engage the shipperrod to shift it laterally. out of ,engagement with. said detent and anair pipe leadingfrom the pump td. the

receiver. I

7. The combination -with a vehicle having a tireto be inflated, of apump supported by the frame of the vehicle, said pump being independentof the wheels of the vehicle, an air-conduit for supplying the tire withair from said pump, a clutch for connecting and disconnecting poweroperated mechanism from the pump, a longitudinallymovableand'laterally-shiftableshipper rod by which the clutch is operated, adetent-for retainingthe shipper rod in position to retain the-clutchmembers in engagement, and a'spring for drawing the shipper rod backwardand disengaging the clutch members, of a disconnecting device comprisingan air receiver, an adjustable screw plfig which closes one end 'of saidreceiver, a piston in the receiver, a spring acting to force the pistonforward, a rod extending from the piston and passing through the screwplug and adapted to engage the shipper rod to shift it laterally out ofengagement with said detent and an air pipe leading from the pump to thereceiver.

In testimony whereof I afiix my signature, in presence of two witnesses.1

' AXEL L. onsov.

Witnesses: I I V Jonas W. DOLPH,

S. B. TILEY.

